Re: [PATCH] capabilities done right

Y2K (y2k@y2ker.com)
Wed, 12 May 1999 13:50:39 -0700 (PDT)

On Wed, 12 May 1999, Alexander Kjeldaas wrote:
> > +What can elfcap do:
> > +* mask inheritable, permitted and effective sets by arbitrary mask
> > +* set euid back to ruid
^^^^^^^^^^^^^^^^^^^^^
> If you break ping in the above scheme, you could edit /etc/passwd and
> gain access to the whole system. Capabilities doesn't gain you much
> if you have to use UID 0.
The ping would run as the calling user not as root.
That is why "set euid back to ruid" is included.
/etc/passwd should probable be not owned by root anymore one could
also argue. bin,daemon,operator,sys,wheel and family should be used more
and possible be joined with yet others.

--
Any caps I mention are *derived* from a withdrawn draft posix document.
See http://www.millenniumproductsllc.com/sjp/ for more info.




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